Corpus ID: 44193832

Scapular orientation in theropods and basal birds, and the origin of flapping flight

  title={Scapular orientation in theropods and basal birds, and the origin of flapping flight},
  author={P. Senter},
  journal={Acta Palaeontologica Polonica},
  • P. Senter
  • Published 2006
  • Biology
  • Acta Palaeontologica Polonica
  • Basal birds such as Archaeopteryx and Confuciusornis are typically portrayed as flapping fliers. However, here I show that shoulder joint orientation in these animals prevented elevation of the humerus above the dorsum, thereby preventing use of the recovery stroke, an important part of flapping flight. In members of the clade Ornithothoraces, which includes extant birds and the extinct avian clade Enantiornithes, the shoulder joint is reoriented to permit elevation of the humerus above the… CONTINUE READING
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